Update v0.9106

As usual here comes the quick fix the address some of the issues of the last update.

CHANGE LIST

• FIXED: typo in the Testament squadron

• FIXED: F-16C B25 Challenge only being considered clear if the player leaves the mission area

• FIXED: win condition for the F-16 S/MTD challenge

• FIXED: win condition for the Su-27S challenge

• FIXED: win condition for the F-104S ASA/M challenge

• FIXED: unlock requirements for the F-22

• FIXED: uploaded the right file for the XST challenge

• FIXED: in the campaign editor, some issues with save/load option

• FIXED: in the campaign editor, the level selection sometimes not saving the last change in the combo box

• FIXED: in the campaign editor, the when creating a new mission the system overwrites all others with the same information

• UPDATED: S_210B challenge

• UPDATED: Su-27SM challenge

• UPDATED: S_210B challenge

• UPDATED: in the campaign editor, some elements to improve usability